attendence login/logout has been implemented

lib/data/datasources/user_local_data_source.dart

@@ -4,11 +4,14 @@ abstract class UserLocalDataSource {
   Future<void> cacheUserToken(String token);
   Future<String?> getCachedUserToken();
   Future<void> clearCache();
+  Future<void> cacheEmployeeId(String id);
+  Future<String?> getCachedEmployeeId();
 }
 
 class UserLocalDataSourceImpl implements UserLocalDataSource {
   final SharedPreferences sharedPreferences;
   static const String _tokenKey = 'user_token';
+  static const String _employeeIdKey = 'employee_id';
 
   UserLocalDataSourceImpl({required this.sharedPreferences});
 
@@ -25,5 +28,16 @@ class UserLocalDataSourceImpl implements UserLocalDataSource {
   @override
   Future<void> clearCache() async {
     await sharedPreferences.remove(_tokenKey);
+    await sharedPreferences.remove(_employeeIdKey);
+  }
+
+  @override
+  Future<void> cacheEmployeeId(String id) async {
+    await sharedPreferences.setString(_employeeIdKey, id);
+  }
+
+  @override
+  Future<String?> getCachedEmployeeId() async {
+    return sharedPreferences.getString(_employeeIdKey);
   }
 }